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Experimental apparatus and method for simulating circular flowing characteristic of sand-carrying drilling fluid

A technology of drilling fluid circulation and flow characteristics, applied in the direction of flow characteristics, measuring devices, instruments, etc., can solve the problems of complicated upward flow mechanism and difficult breakthrough in theoretical analysis.

Inactive Publication Date: 2014-02-05
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] Since the conventional mud-carrying flow or gas-carrying flow is a liquid-solid or gas-solid multiphase flow, its upward flow mechanism in the vertical annulus or the inclined annulus when there is a well deviation is very complicated, and it is difficult to make a breakthrough in theoretical analysis

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  • Experimental apparatus and method for simulating circular flowing characteristic of sand-carrying drilling fluid

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Embodiment Construction

[0018] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, an experimental device for simulating the circulating flow characteristics of sand-carrying drilling fluid is composed of three parts: the simulated drilling system, the mud circulation system and the air circulation system. Experiments on flow characteristics. The simulated drilling system consists of a derrick 1 , a top drive 2 , a drill pipe 3 , a wellbore 4 , a drill bit 5 and a wellbore tempered glass window 6 . The top drive 2 and the shaft 4 are fixedly installed on the derrick 1, and the derrick 1 is supported by a movable strut, and the angle of the derrick 1 can be changed by moving the strut, so as to meet the requirements of experiments under different well inclination angles. The lower part of the top drive 2 is connected with a drill pipe 3, and the drill pipe 3 extends into the inside of ...

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Abstract

The invention relates to an experimental apparatus and method for simulating the circular flowing characteristic of a sand-carrying drilling fluid. The experimental apparatus is characterized by comprising a simulating drilling system, a slurry recycling system and an air circulating system, and being capable of developing a drilling fluid circular-flowing characteristic experiment under two conditions of using slurry as the drilling fluid and using air as the drilling fluid. A derrick of the experimental apparatus can be regulated to different inclination angles, so as to meet the experimental monitoring on the drilling fluid circular-flowing characteristic under different well deflection working conditions of a vertical well, a directional well, a horizontal well and the like. An arranged toughened glass window is capable of observing the flowing state of the sand-carrying drilling fluid in real time, and an arranged pressure meter and an arranged flow meter are capable of monitoring the pressure change and the flow change of the sand-carrying drilling fluid.

Description

technical field [0001] The invention belongs to the field of experimental research on the flow characteristics of drilling fluid, in particular to an experimental device and method for simulating the circulation flow characteristics of sand-carrying drilling fluid. Background technique [0002] Drilling fluid is the blood of drilling engineering, and it undertakes the important tasks of purifying the wellbore, cooling and lubricating drilling tools, transmitting hydraulic power, and balancing the lateral pressure of the rock on the wellbore wall and the formation pressure at the bottom of the well. It is very important to fully grasp the circulation characteristics of drilling fluid for the selection and control of drilling parameters. Drilling fluid carries cuttings back up in the annular space of the wellbore. If the speed is too slow, its kinetic energy is not enough to carry the rock to the ground, resulting in wellbore blockage and affecting drilling; if the speed is to...

Claims

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Application Information

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IPC IPC(8): G01N11/00
Inventor 朱红钧赵洪南林元华巴彬王其军孔祥伟潘倩
Owner SOUTHWEST PETROLEUM UNIV
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